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javapackagingexecutable-jar

Why is my jar not running?

I can run my program outside of a jar file, but I want to deploy it and run it as a jar.

This command works for running the .class file:

java -classpath .;./libs/mail.jar;./libs/jcommon-1.0.16.jar;./libs/jfreechart-1.0.13.jar;./libs/jxl.jar;./libs/ojdbc5.jar gdsreports/ReportsDriver

This is how I package my jar file:

jar -cfvm GDSReports.jar GDSReports.mf gdsreports/* util/* libs/*

My manifest looks like this:

Manifest-Version: 1.0
Main-Class: gdsreports.ReportsDriver
Created-By: Me

This is how I run my jar: 

java -classpath .;./libs/mail.jar;./libs/jcommon-1.0.16.jar;./libs/jfreechart-1.0.13.jar;./libs/jxl.jar;./libs/ojdbc5.jar;./util;./gdsreports -jar GDSReports.jar

However, run I run the jar file, it fails to load all the libraries. This is what it spits out:

Error loading configuration file: config/reportConfig
Error loading configuration file: config/gdsIds
Exception in thread "main" java.lang.NoClassDefFoundError: jxl/write/WriteException
        at util.ReportConfig.setupReports(ReportConfig.java:197)
        at util.ReportConfig.setup(ReportConfig.java:65)
        at gdsreports.ReportsDriver.main(ReportsDriver.java:36)
Caused by: java.lang.ClassNotFoundException: jxl.write.WriteException
        at java.net.URLClassLoader$1.run(Unknown Source)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        ... 3 more

This is the expected output:

Error loading configuration file: config/reportConfig
Error loading configuration file: config/gdsIds
-------------------------------------
Running TimingReport with parameters:
        Filename: Reports/06-26-2012/TimingRptZL_06-26-2012.xls
        Brand: ZL
        Using production database: false
-------------------------------------
-------------------------------------
Exception in thread "main" java.lang.NullPointerException
        at gdsreports.TimingReport.fillChartData(TimingReport.java:417)
        at gdsreports.TimingReport.fillReport(TimingReport.java:238)
        at gdsreports.TimingReport.run(TimingReport.java:131)
        at gdsreports.ReportsDriver.main(ReportsDriver.java:40)

What am I doing wrong?

Solution

  • The -classpath argument (and the CLASSPATH environment variable) are ignored when you use the -jar argument.

    If a jar file depends on other libraries, you have two choices:

    1. Use the Class-Path header in your MANIFEST.MF file to call out the other jars, or
    2. Unpack the other jars and include them in your jar.